A 110 GHz ozone radiometer with a cryogenic planar Schottky mixer

• Published in: IEEE transactions on microwave theory and techniques Vol. 41; no. 12; pp. 2232 - 2236
• Main Authors: Koistinen, O.P., Valmu, H.T., Raisanen, A., Vdovin, V.F., Dryagin, Y.A., Lapkin, I.V.
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.12.1993; Institute of Electrical and Electronics Engineers
• Subjects: 540120 - Environment, Atmospheric- Chemicals Monitoring & Transport- (1990-); AIR POLLUTION MONITORING; Amplitude modulation; CALIBRATION; Cryogenics; DESIGN; Electromagnetic wave absorption; ELECTRONIC EQUIPMENT; ENVIRONMENTAL SCIENCES; Exact sciences and technology; Feeds; Filters; Frequency; HETERODYNE RECEIVERS; Instruments, apparatus, components and techniques common to several branches of physics and astronomy; MEASURING INSTRUMENTS; MICROWAVE EQUIPMENT; MONITORING; Optical instruments, equipment and techniques; OZONE; Photometers, radiometers and colorimeters; Physics; RADIATION DETECTORS; RADIO EQUIPMENT; RADIOMETERS; Radiometry; Temperature; Microwave mixer; Circuit design; Microwave radiometer; Measuring instruments; Microwave circuit; Microwave receiver; Schottky barrier
• ISSN: 0018-9480; 1557-9670
• DOI: 10.1109/22.260711

A total power radiometer for monitoring the stratospheric ozone spectral line at 110 GHz is presented. Special features such as a cooled planar Schottky mixer as the front end and efficient reduction of standing waves in the quasi-optics are discussed in detail. The noise temperature of the receiver is 530 K (single sideband), and the total bandwidth of the receiver is 1 GHz. A dual acoustooptical spectrometer is used for the signal detection.< >